After a major data breach that led eBay to recommend users to update their passwords, company officials didn't think customer data was at risk. However, after customer data was involved, the company moved "swiftly" to ensure customers were secure - though eBay officials also didn't disclose when the breach occurred.

"For a very long period of time we did not believe that there was any eBay customer data compromised," said Devin Wenig, eBay global marketplace chief, following news of the breach. "We want to make sure it doesn't happen again so we're going to continue to look (at) our procedures, harden our operational environment and add levels of security where it's appropriate."

The data breach has led to multiple investigations, with additional states and countries likely to follow suit, as the No. 1 auction site tries to move forward. The data breach happened after cybercriminals were able to use corporate employee credentials to track down customer data.